求教NN们一道语法题，找不到合理解释啊

vivian1029

Several studies have found that the coronary patients who exercise most actively have half or less than half the chance of dying of a heart attack as those who are sedentary.


A. have half or less than half the chance of dying of a heart attack as those who are sedentary
B. have half the chance, or less, of dying of a heart attack than those who are sedentary do
C. have half the chance that they will die of a heart attack, or less, than those who are sedentary do
D. are at least fifty percent less likely to die of a heart attack as those who are sedentary
E. are at least fifty percent less likely than those who are sedentary to die of a heart attack
答案选E，我选了B，不懂，是have the chance of ...的用法有问题吗？求教大大们！

sheanen

chance 應該用 fewer/greater 不是less/more

vivian1029

sheanen 发表于 2017-3-17 13:11
chance 應該用 fewer/greater 不是less/more

原来如此，感谢